Example: You must / don’t have to tidy your room. It’s a mess.

1 You don’t have to / mustn’t swim there. It’s dangerous.

2 I haven’t to / don’t have to do my homework. It’s Saturday.

3 She must / mustn’t practise the piano tonight. She’s not very good.

4 They have to / don’t have to be home early. They’re very young.

5 We mustn’t / don’t have to buy tickets – entrance is free.

6 You can’t / must go to the party. It’s too late.